What’s Vulnerable › Vulnerabilities

CVE-2019-25590: Axessh 4.2 Denial of Service via Log File Name

• Severity: medium (CVSS 6.2 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-03-22 · updated 2026-06-17
• Weakness: CWE-1282

Description

Axessh 4.2 contains a denial of service vulnerability in the logging configuration that allows local attackers to crash the application by supplying an excessively long string in the log file name field. Attackers can enable session logging, paste a buffer of 500 or more characters into the log file name parameter, and trigger a crash when establishing a telnet connection.

Affected products

• Labf Axessh: 4.2

References

• http://www.labf.com
• http://www.labf.com/download/axessh.exe
• https://www.exploit-db.com/exploits/46858
• https://www.vulncheck.com/advisories/axessh-denial-of-service-via-log-file-name

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